Astronomy:298 Baptistina
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Short description: Asteroid
 Asteroid 298 Baptistina (apparent magnitude 15.2) near a mag 15.3 star | |
| Discovery | |
|---|---|
| Discovered by | Auguste Charlois |
| Discovery date | 9 September 1890 |
| Designations | |
| (298) Baptistina | |
| A890 RB | |
| Minor planet category | |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 123.99 yr (45289 d) |
| |{{{apsis}}}|helion}} | 2.4805 astronomical unit|AU (371.08 Gm) |
| |{{{apsis}}}|helion}} | 2.0475 AU (306.30 Gm) |
| 2.2640 AU (338.69 Gm) | |
| Eccentricity | 0.095630 |
| Orbital period | 3.41 yr (1244.3 d) |
| Mean anomaly | 209.69° |
| Mean motion | 0° 17m 21.588s / day |
| Inclination | 6.2884° |
| Longitude of ascending node | 8.2161° |
| 135.004° | |
| Physical characteristics | |
| Dimensions | 13–30 km[2][3] |
| Rotation period | |
| X-type | |
| Absolute magnitude (H) | 11.2 |
Baptistina (minor planet designation: 298 Baptistina) is an asteroid orbiting in the asteroid belt. It is the namesake of the Baptistina family. It was discovered on 9 September 1890 by Auguste Charlois of Nice. The source of its name is unknown.[4] It measures about 13 to 30 kilometres (8 to 19 mi) in diameter. Although it has an orbit similar to the Flora family asteroids, Baptistina is an unrelated interloper.[5] It was once considered a possible source of the impactor that caused the extinction of the dinosaurs, a possibility ruled out by the Wide-field Infrared Survey Explorer (WISE) in 2011. (See Baptistina family.)
References
- ↑ 1.0 1.1 "298 Baptistina". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=298;cad=1.
- ↑ Reddy V., et al. (2008). Composition of 298 Baptistina: Implications for K–T Impactor Link, Asteroids, Comets, Meteors conference.
- ↑ 3.0 3.1 Majaess D., Higgins D., Molnar L., Haegert M., Lane D., Turner D., Nielsen I. (2008). New Constraints on the Asteroid 298 Baptistina, the Alleged Family Member of the K/T Impactor , accepted for publication in the JRASC
- ↑ Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names. Springer Science & Business Media. p. 41. ISBN 978-3-540-00238-3. https://books.google.com/books?id=KWrB1jPCa8AC&pg=PA41.
- ↑ M. Florczak et al. A Visible Spectroscopic Survey of the Flora Clan, Icarus Vol. 133, p. 233 (1998)
External links
- Lightcurve plot of 298 Baptistina, Palmer Divide Observatory, B. D. Warner (2009)
- Asteroid Lightcurve Database (LCDB), query form (info )
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)–(5000) – Minor Planet Center
- 298 Baptistina at AstDyS-2, Asteroids—Dynamic Site
- 298 Baptistina at the JPL Small-Body Database
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